From: Thomas Huth <thuth@redhat.com>
To: Farhan Ali <alifm@linux.ibm.com>, qemu-devel@nongnu.org
Cc: alex.williamson@redhat.com, stefanha@redhat.com,
mjrosato@linux.ibm.com, schnelle@linux.ibm.com,
philmd@linaro.org, kwolf@redhat.com, hreitz@redhat.com,
fam@euphon.net
Subject: Re: [PATCH v6 1/3] util: Add functions for s390x mmio read/write
Date: Wed, 7 May 2025 20:09:58 +0200 [thread overview]
Message-ID: <2dfcf252-99e2-45f9-b958-770d14a1ab7b@redhat.com> (raw)
In-Reply-To: <20250430185012.2303-2-alifm@linux.ibm.com>
On 30/04/2025 20.50, Farhan Ali wrote:
> Starting with z15 (or newer) we can execute mmio
> instructions from userspace. On older platforms
> where we don't have these instructions available
> we can fallback to using system calls to access
> the PCI mapped resources.
>
> This patch adds helper functions for mmio reads
> and writes for s390x.
>
> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
> Reviewed-by: Niklas Schnelle <schnelle@linux.ibm.com>
> Signed-off-by: Farhan Ali <alifm@linux.ibm.com>
> ---
> include/qemu/s390x_pci_mmio.h | 24 ++++++
> util/meson.build | 2 +
> util/s390x_pci_mmio.c | 146 ++++++++++++++++++++++++++++++++++
> 3 files changed, 172 insertions(+)
> create mode 100644 include/qemu/s390x_pci_mmio.h
> create mode 100644 util/s390x_pci_mmio.c
FWIW,
Acked-by: Thomas Huth <thuth@redhat.com>
next prev parent reply other threads:[~2025-05-07 18:10 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-30 18:50 [PATCH v6 0/3] Enable QEMU NVMe userspace driver on s390x Farhan Ali
2025-04-30 18:50 ` [PATCH v6 1/3] util: Add functions for s390x mmio read/write Farhan Ali
2025-05-07 18:09 ` Thomas Huth [this message]
2025-04-30 18:50 ` [PATCH v6 2/3] include: Add a header to define host PCI MMIO functions Farhan Ali
2025-05-05 9:38 ` Thomas Huth
2025-05-07 16:15 ` Farhan Ali
2025-05-07 17:45 ` Stefan Hajnoczi
2025-04-30 18:50 ` [PATCH v6 3/3] block/nvme: Use host PCI MMIO API Farhan Ali
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